NIMONIC Alloy 80A,Nickel-Chromium Alloy; UNS N07080，1

### **Product Introduction: NIMONIC® Alloy 80A (UNS N07080)** **NIMONIC® Alloy 80A** is a precipitation-hardenable nickel-chromium alloy renowned for its excellent high-temperature strength, particularly its superior creep resistance and resistance to oxidation at temperatures up to 815°C (1500°F). It represents a significant evolution from solid-solution alloys like Nimonic 75, achieving enhanced mechanical properties through the addition of aluminum and titanium, which form the strengthening gamma prime (γ') phase, Ni₃(Al, Ti), during a controlled aging heat treatment. This alloy is a classic "workhorse" superalloy, offering an optimal balance of high tensile and creep-rupture strength, good fabricability, and adequate corrosion resistance. It is widely used in the aerospace industry for highly stressed components like turbine blades and is also specified across various industrial sectors for high-temperature fasteners and valve applications. --- ### **International Standards & Material Equivalents** NIMONIC Alloy 80A is covered by a comprehensive set of international standards, reflecting its global acceptance. | Standard Type | Standard Number | Designation / Product Form | | :--- | :--- | :--- | | **UNS (USA)** | **N07080** | **NIMONIC Alloy 80A** | | **BS (UK)** | **HR 504** | Bar and Forgings | | **AMS (Aerospace)** | **5842** | Bar, Forgings, and Ring | | **AMS (Aerospace)** | **5742** | Billet and Bar (for Reforging) | | **DIN (Germany)** | 17742 | NiCr20TiAl | | **Werkstoff Nr.** | **2.4631** | **2.4631** | | **AFNOR (France)** | NC20TA | | | **ISO** | 9725 | NiCr20TiAl | > **Note:** NIMONIC is a registered trademark. The primary identifiers are **UNS N07080** and **Werkstoff 2.4631**. --- ### **Chemical Composition** The composition is precisely controlled to achieve a robust response to precipitation hardening. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 18.0 - 21.0 | | **Titanium (Ti)** | 1.8 - 2.7 | | **Aluminum (Al)** | 1.0 - 1.8 | | **Iron (Fe)** | 3.0 max. | | **Cobalt (Co)** | 2.0 max. | | **Carbon (C)** | 0.10 max. | | **Silicon (Si)** | 1.0 max. | | **Manganese (Mn)** | 1.0 max. | | **Copper (Cu)** | 0.2 max. | --- ### **Physical Properties** The physical properties of Nimonic 80A support its use in high-stress, high-temperature environments. | Property | Value | | :--- | :--- | | **Density** | 8.19 g/cm³ (0.296 lb/in³) | | **Melting Point** | ~1355 °C (~2470 °F) | | **Thermal Conductivity** | 11.5 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.24 μΩ·m (at 20°C) | | **Modulus of Elasticity** | 224 GPa (32.5 x 10⁶ psi) | | **Coefficient of Thermal Expansion** | 13.4 μm/m·°C (20-100°C) | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties (Typical for Solution Treated and Aged Condition)** The alloy achieves its high strength through a two-step heat treatment: solution treatment followed by aging. | Property | Value (Room Temperature, Aged) | | :--- | :--- | | **Tensile Strength** | 1000 - 1200 MPa (145 - 174 ksi) | | **Yield Strength (0.2% Offset)** | 700 - 850 MPa (102 - 123 ksi) | | **Elongation** | 20% - 30% | | **Hardness (Rockwell C)** | 28 - 38 HRC | --- ### **Key Characteristics & Advantages** 1. **Excellent Creep-Rupture Strength:** Its primary advantage is the ability to withstand high mechanical loads for extended periods at temperatures up to 815°C (1500°F). 2. **Good Oxidation Resistance:** The chromium content provides effective resistance to scaling and oxidation in air at high temperatures. 3. **Precipitation Hardenable:** Gains significant strength from the formation of gamma prime precipitates during aging, offering a superior strength-to-weight ratio compared to solid-solution alloys. 4. **Good Fabricability:** Can be forged, hot-worked, and machined, though it requires more power and appropriate tooling compared to milder alloys. 5. **Weldability Considerations:** It can be welded using resistance and fusion techniques, but post-weld heat treatment is essential to restore properties and minimize the risk of strain-age cracking in the heat-affected zone. --- ### **Product Applications** NIMONIC Alloy 80A is a critical material in several high-performance industries. * **Aerospace & Jet Engines:** * **Turbine blades and discs** for gas turbine engines. * **Rings, casings,** and other rotating components. * **Fasteners** and bolts for high-temperature sections. * **Industrial Gas Turbines:** * **Blades, vanes,** and other hot-section components. * **Automotive & Racing:** * **Turbocharger wheels** and components for high-performance engines. * **Exhaust valves** and springs. * **Industrial Engineering:** * **High-temperature bolts,** nuts, and studs for furnaces and pressure vessels. * **Hot-work tooling** and extrusion dies. ### **Summary** **NIMONIC Alloy 80A (UNS N07080)** is a foundational, precipitation-hardenable nickel-chromium superalloy that sets a benchmark for **high-temperature creep resistance and tensile strength** in the range of 700-815°C. Its well-balanced composition, strengthened by gamma prime precipitates, provides a reliable solution for the most demanding rotating and static components in aerospace propulsion and power generation. Governed by standards like **AMS 5842** and **BS HR 504**, it remains a widely trusted and specified alloy where long-term performance under high stress and temperature is non-negotiable, effectively bridging the gap between solid-solution alloys and more complex, higher-performance superalloys.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3310 gallon liquid totes Special package is available on request.